<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="refresh" content="5;url=hello.html"> 
<meta http-equiv="refresh" content="3;url=javascript:history.back(-1);">
<title>页面飞走了</title>
</head>
<body>

	<h2>抱歉！您访问的页面不存在！三秒后<input type="button" name="Submit" onclick="javascript:history.back(-1);" value="返回上一页"></h2>

</body>
</html>